South Power Unveils Groundbreaking 8.338MWh Energy Storage System at ESIE 2025

8.338 MWh! On April 10, at the 13th International Energy Storage Summit and Exhibition, South Power unveiled its new standard 20-foot single box energy storage system, the Center L Max, marking a significant step into the 8 MWh era for the energy storage industry. The Center L Max 8.338 MWh energy storage system features a self-developed ultra-large capacity solid-state battery. The increased energy density provided by the solid-state battery, combined with optimized space utilization and functional structure within the system, allows this energy storage unit to achieve a capacity of 8.338 MWh. This represents a 167% improvement in energy density compared to mainstream 20-foot, 5 MWh energy storage systems, setting a new industry record.

Enhanced Flexibility: Modular Design

As energy storage stations transition from hundreds of MWh to GWh, the focus on flexibility and compatibility within energy storage systems is crucial. The Center L Max system can accommodate configurations of 4 or 8 battery clusters, allowing for customized combinations based on different project requirements. Its modular design facilitates flexible expansion without the need for system downtime, effectively addressing various energy storage demands while significantly lowering land usage costs. The Center L Max supports configurations of 4 clusters at 2000V, offering substantial enhancements in energy density and energy conversion efficiency compared to traditional 1500V systems, while also reducing integration costs, line losses, land area, and construction expenses.

Furthermore, the system employs an adaptive power topology architecture that enables flexible charge and discharge adjustments over a wide time scale of 2 to 8 hours, achieving a charging and discharging efficiency of up to 96%. This capability meets diverse operational needs such as peak shaving, frequency regulation, new energy consumption, and emergency backup.

Increased Safety: Comprehensive Active Defense

Safety is the foundational principle for the advancement of the energy storage sector. The Center L Max system is designed in compliance with stringent standards such as NFPA 855 and IEC62933. Its full-feature design, which includes “one preemptive measure, two leakage prevention strategies, and three extinguishing methods,” ensures zero loss of control. The system integrates electrochemical mechanisms and data-driven dual models to develop a battery health assessment method based on multi-modal data including voltage, temperature, stress, and acoustics. A high-precision thermal runaway early warning mechanism can detect risks 24 hours in advance.

The ultra-large capacity solid-state battery incorporates a “flexible two-phase oxide solid electrolyte” and a “multi-layer heterogeneous composite structure design,” leading to significant improvements in inherent safety and high performance.

Additionally, the bionic structure safety cabin, inspired by honeycomb principles, optimally distributes internal pressure to effectively disperse instantaneous high pressure caused by thermal runaway or external impacts. This is complemented by high-temperature resistant composite materials and directional pressure relief channels, creating a tri-level protection system: “buffer—disperse—release.” Testing data shows a 50% improvement in explosion resistance under extreme pressure impacts. The system’s core components boast an IP68 protection rating and an 8-level seismic strength structure, enabling it to provide reliable energy solutions in extreme environments such as islands and deserts.

Innovative Heat Control: Nano-Scale Gas-Liquid Dual-Phase Suppression

The Center L Max system introduces a unique three-tier defense system involving “multi-dimensional early warning—electrochemical suppression—thermal runaway isolation,” featuring dual-phase fire extinguishing and millisecond-level fault isolation mechanisms to prevent thermal runaway from spreading. It is equipped with composite detection devices at various levels within the battery, module, battery cluster, and battery cabin, utilizing a new type of extinguishing agent with high vaporization heat and strong adhesion. This setup allows for targeted fire suppression strategies based on thermal runaway models, programmed control of valves, and effective release of suppressants.

Higher Efficiency: 70% Reduction in System Energy Consumption

The Center L Max system achieves a groundbreaking 70% reduction in overall energy consumption through its innovative “high-temperature battery + superconducting liquid cooling” dual-core technology. The ultra-large capacity solid-state battery benefits from its superior high-temperature lithium battery material system, structural design, and temperature control, allowing for a higher operational temperature threshold. The liquid cooling system’s activation temperature can be increased by 10°C, reducing energy consumption associated with frequent startups. Significantly, the superconducting liquid cooling module employs graphene composite gravity heat pipe technology, greatly enhancing heat transfer efficiency compared to traditional metallic pathways. Coupled with intelligent variable frequency pump systems and gradient temperature control algorithms, the cooling energy consumption drops by 40%, making it an adaptable solution for new energy projects in high-temperature regions.

Intelligent Operations: AI-Driven Self-Evolution

The Center L Max system integrates an AI technology engine that reduces operational costs by 60% through its “AI battery model + digital twin hub + multi-objective optimization algorithm” framework. It merges cutting-edge AI technology with the battery system, continuously collecting characteristics such as voltage and temperature through the digital twin hub to create a dynamic digital representation. This allows for in-depth data analysis, with AI predictive maintenance achieving over 99% accuracy. The system also incorporates multi-objective collaborative optimization algorithms that dynamically generate dual strategies for “economic and low-carbon performance,” facilitating participation in spot trading and auxiliary services. Compared to manual methods, AI-driven trading can enhance overall returns by 35%. Additionally, the Center L Max’s OTA technology enables remote software upgrades, allowing for real-time updates and strategy optimization, with operational response times improved to minute-level.